James mcarthue



(No Model.)

J. MOARTHUR.

SASH BALANCE.

Patented May 14, 1889.

In V87? 50 2':

n, D. C.

UNITED STATES PATENT OFFICE.

JAMES MCARTHUR, OF ROCHESTER, NEIV YORK, ASSIGNOR TO THE PULL- MAN SASH BALANCE COMPANY, OF SAME PLACE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 403,479, dated May 14, 1889.

Application filed October 6, 1888. Serial No. 287,359. (No model.)

To all whom it may concern.-

Be it known that I, JAMES MCARTHUR, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Sash-Balances, which i1nprovement is fully set forth in the following specification, and shown in the accompanying drawings.

This invention relates to the class of sash- Io balances in which springs are used to support the weight of the sash, and these balances are placed vertically over the sash to be controlled, the object being in part to dispense with the small spiral spring, indicated I 5 by the reference-letter r in my patent, No. 354,162, of date December ll, 1886, and to bend the plate at an angle to adapt it to fit the corner of the window-frame, the invention being hereinafter fully described, and

the novelty pointed out in the claim.

Referring to the drawings, Figure 1 is a side elevation of my improved sash-balance with portions of the window casing and sash, parts being broken away and vertically sec- 2 5 tioned; Fig. 2, a view of the sash-balance, seen as indicated by arrowa: in Fig. l and Fig. 3, a View of the same, seen as indicated by arrow y in Fig. 1.

Referring to the parts shown in the drawings, A is a portion of the window-casing, B the sash, and O my improved sash-balance placed in a cavity, a, in the casing vertically over the corner of the sash.

b is a bed-plate bent at right angles, so as 3 5 to have the horizontal portion secured to the under surface of the upper part of the casing and the vertical part secured to the face of the side of the casing by ordinary screws, 0.

dis a frame, similar to the one shown in my said patent, secured rigidly to the plateand formed to hold thespring-drum c by means of a motionless shaft, f1 Upon the spring-drum, which is of common kind, the ordinary supporting-band, g, for the sash is wound, as shown, the end of the band leading from the coils upon the drum in a tangential direction, and suspended vertically through an opening, 72, in the plate at the angle thereof.

1' is a brake or curved friction-strap, held in position to in part encircle the drum and bear upon the outer coil of the band, to retard the motion of the sash, this brake being in some respects similar to the corresponding part shown in my said patent. This brake is turned laterally outward at its free end, and pierced to receive an adjusting-screw, k, reaching upward through the plate. This screw, used to regulate the action of the brake, is provided with a threaded retaining-nut, Z, and a spiral spring, a, all of which parts are similar to the corresponding parts shown in my said patent and used for the same purposes. This brake is an elastic metal strip, and, unlike that shown in said patent, is secured rigidly to the vertical part of the plate b by holders 0, so that, from its elasticity, it will constantly stand a little apart from the band, but is held against the band by the adjustingsorew. On this account no spiral spring, such as shown at r in my said patent, is required to keep the free end of the brake held back against the spiral spring.

The brake shown in my said patent is held to the frame at Z loosely, and so as to admit of motion, on which account the spring 1" was ren dered necessary.

By bending the plate I), as shown in my present invention, and placing the balance in the upper horizontal part of the casing, I get a vertical suspension of the sash, which is desirable.

What I claim as my invention is A sash-balance having a bed-plate bent to form an angle, in combination with a frame secured to the bed-plate, an actuatingdrum held by the frame, a suspending-band on the drum, a curved elastic friction strap or brake secured rigidly to the bed-plate in position to in part encircle the drum, and an adj ustingo screw for the brake, provided with a spring and retaining-nut, substantially as and for the purpose set forth.

JAMES MCARTIIUR.

\Vitnesses:

E. B. WHITMORE, M. L. MODERMOTT. 

